Cushion tire



Y l 1;641,15o Sept 6 1927" w. A. BRUBAKER GUSHI ON TIRE Filed Jan. 50. 1924 2 Sheets-Sheet l WILLIAM A. BRUBAKER, OF AKRON, ,OI-IIC.-A

CUSHION Tran.'

Application filed January 30, 1924. Serial No. 689,402, l

` My invention relates `to cushion tires and the vprincipal object of my invention is to provide a cushion tire easy to manufacture, so formed4 asl to minimize the likelihood of wave formation in the cushion portion, sok formed as to constantly carry the load partly on air and partly on rubber, so formed as to yield Vreadily under blows or impacts and thus simulate as readily 'as posy sible the resistance of a pneumatictire, andY so constructed that the resistance to yielding isrsubstantially uniform about the periphery ofthe tire. In the drawings accompanying this specification and forming a part thereof I haveV shown, forypurposes of illustration, one form which my invention may assume. In these drawings1 I Figure 1' is a sideelevation of this illus` trative form of4` my invention,

Figure 2 is arectilied plan view of the tire shown in Figure 1 illustrating the relative relation of the various recesses,

Figure 3 is a `section on the line 3--8 of Figure 1, ywhile 't Figure 4l is a section; on the 1f-4iof Figure 2. Y Y

The tire herein shown comprises a base region 11 fixed toa rnn 12 of any suitable construction, atread region v13 carrying tread 14, and' anint'ermedia'te regionly disposed between the baseregion llfand the tread ,region 13 eifective' to iirmly connect the base region 11 and the tread're'gion 13. 'Ihe intermediate region 15 is so formed, and the intermediate region '15 and tread 11i are so correlated,that the tire not only absorbs readily the blows and impacts imposed upon it and thus prevents the transmission of vthese blows and impacts to the vehicle but also prevents the accumulation of wave action in the intermediate region 15 andthe consequent destruction of the intermediate region 15 andat the same time presents at vall points aboutthe periphery a substantial ly vuniform capacity for the absorption of blows and impacts and consequently eliminates the jarand vibration present in the tires now in use. y f

In the present'embodiment of my invention I provide in theA intermediate regiony 15 a plurality of recesses 16 arranged in two sets each extending inwardly from one of the two lateral faces 17 of the interinedia-te region 15 and in .this particular embodiment of my invention the recesses 16 of each set are disposed in staggered relation to the recesses 16 of the other set and each recess 16 of either vset is of a generally squareucross scctie'n formed by the faces 18 and 19 generally parallel to the tangent to the tire at t-he point of intersection of the periphery of the tire and ,the radius extending centrally through the recess 16 and the faces 2O andV 21r generally parallel `to the aXial plane through the center of the recess 16. In this embodiment,however, this squarecrosssection is modified by the presence ofthe four inclined surfaces 22 extendingkbet'we'en the ends of the main surface 18, 20, 19, and 21,

`v while each of the recesses 16 is terminated by a substantially hemispherical surface 223 l of the recesses 16 but broken over'the central portion by a cylindrical extension recess 24 of a diameter appreciably less than either the width or height of the abutment or iin 27 separating adjacent recesses 16 and Vof a length substantially equal to the shortest distanceV between a recess 16 on oneside of the tire and the adjacent recess 16 on the opposite side of the tire. In addition, the recesses 16 are so placed that the abutments 27 etween adjacent' recesses16 are of a width `less Ythan the width of the recesses 16.

`27 betweenthe recesses 16 whereby the tread consists of a narrow central rib 29 flanked on each side by a plurality of blocksBO each verlying one of the recesses 16, of an eX- tent peripherally of the tire greater than that ofthe recess 16, and, together with the rib 29, of an extent across the tire greater than that of the recess 16.

`W ith the above construction the sinuosity of the web 26 and the spa-ced relation of the tins 27 prevent wave formation in the intermediate region 15,.and the continuity of the ribs 26 and 30 causes the weight of the vehicle yto be always carried partly on lle rubber, the 'dimensions and positioning of fi O ll parir; eff the web 25 und the zilauulz l'lle periphery of the lire the weight nl the whiele ir; euri-leal pai-Hy by ruuher under eempressieu and pzu'l'lj; by ri'ihher Whieh is: uilzlioulz llireeb Support :Nul iu ieuel' the p rhs uf the wel) 25 mul el the parte elf lh@ lrezifl 1,-1; azul The correlation between the mills-1 0'? the Web 225i sind die parla el" [he lreefl 1,4; are :auch that' 4he reis! nee m? le emhpremueu is mhsixiutialljr lee the rire saillie :il: :ill poilus uheul' the perl'iherji' el the lire.

f *wil he uiulerseel h J l'hei-,ae silillell iu, lhe url' lhzi lhe particular eeusiruelieu here iu shown uml le eribed may he variously changed :mil modified Wil-hout sziexfiliviug lhe :uliuulgges el? .my invention er departing :liuui the spilil flier-eef :mil il'` will there- 'lieie he, umlereisleell that the elii'elosure herein. illustrative only :nul thai my ix'feulimn is uol: liulileil Jherelo.

lf claim:

l. A cushion tire Comprising nu ziimulur hase i'elfieii` im zuiuulur Erlzul regimi, will :15u :iiurulsir iu'eruieilhile regimi llispeueil he,- liveeu ,Quill liasse regfm and. said l kewl, region :full :ouuufieiug :1` eeutal peripheiilly exl'euiliug ril nucl :i plumlil)7 of lies @Kremlimg luie 'elly from euch Rifle of said ril) iu lieriphemlly spueeil rele-dou with the fins eu meh iside el! said rib (lisperlecl ommsile ilie imees': on l'he other side olf Said rib, Willi each elf said fins of am extent periphernlly m annular iuteirineflinle regimi ilirapof-tellV ielween will hsfle regimi mul .will lieiul regimi mul comprising;` i renti-nl eriphe:f;ally exl'eiuliug fainueus rib zuul zi` plurz lily el" lis exlemfling' laterally il'rem each :side el sli'zl rilin in periph rulli @spared rel: lieu Wil'h lhe fine; cm eueh side 0l Suid rih (lispeel 0] pesile lhe @puces en the other side elf mid rib, with ezeh of smid, line1 ef im exleiu: seriiliherully el? miel tire nel: greater hzih lhe eorrei-rpm'if'iiuf; extent elf the epposil'e spiiee, and with sui/ll rib inleieepecl opposite eneh liu by e reeeicei of a length eiibsilinuialljf equal le he width el" seid rib 21ml el am eizl'eut periplieii'alh' elI will tire lexis l'lmu he eerrespemliug exlent eli the opposite liu.

2E. Jr eus-:hicm lire comprising am :uu'lulur ltzlse region, am :annular treuil region, and nu. :muulfir iutei'meihule regiem dipeseil heluren sziial linee regimi nml Suid lrezul regriiim unil eoluprifsing :i Central peripheriilly ex"- remling ril) :uid u` plu ulty of fins extending; hi'ternlly freni efuh iside olf seid ril) in periphezllly sli'isieefl 1'Lliil1ie11w'i'ilh the [im ou eneh side of sniilirib cliiipeeeil epuoffile the smees ou Jche el'he Hille if sizicl ril) 21ml with saiffl rib ntereeplell opposite each fin ,elfe regionj :1n :iluiuliir lireiu'i regimi.D mul.

fil!

by u` reeesse extending inwardly from i'ihe eumumi 'aline spziee mid el. am exl'euli gieriphemlly of will lire apiireezibly less them that el' Suid eemmunentiug; space.

lln teslzimeuy whereof, hereunto nlx my signature.

Wmim'ir. A. BRUBAKE la. 

